I think it's a case of wishful design. When they (or rather their own vibecoding tools) imagine how the tool is used, they aren't imagining that it's actually a human-machine interface, with the human actively engaged in the loop. Instead, the human is mostly expected to behave as a magical prompt oracle with a credit card and let the machine take care of the details.

by devs you mean those two guys on twitter who brag about vibe coding with 100 agents running simultaneously. While Claude Code still can't display images. I wonder what they are doing with those 100 agents

It's definitely a case of out-of-touch devs, but which cohort they are is still to be seen.